@therev34: M/L will fit you no problem. We've seen them on size 15.
The M/L fits a very wide range no problem, and have been on as small as size 6 and over 13. Our foot has a very large amount of stretch as it utilizes 40% elastic and spandex yarns.

Click 'pre-order' to be redirected to the product, or copy and paste: https://www.endurapparel.com/products/steve-smith-kit-sock
Any questions can be DM'd to us and we'll respond within the day, thanks!